In order to help protect park resources and maintain balance between recreational use and public events, a rest period was implemented for the 2016 permit season in Denver's seven busiest parks. This pilot program was originally planned for April 1-October 31, 2016, but was extended to the same time period in 2017 in order to obtain meaningful feedback and determine any adjustments needed for 2018. Rest periods ranged from 2 to 4 weekend days per month (see this link for details). In addition, the 5th weekend in a month was not booked for public events (with exceptions for historical priority events), and no new events were booked on Memorial Day, July 4th and Labor Day.